Living Room Bamboo flooring and custom built-ins—fashioned from medium-density fiberboard with a white-lacquer finish—brightened Gavin and Sheila Smith’s 650-square-foot attic. Gavin Smith designed the blackened-steel balustrade, which has cable inserts and a walnut handrail.  Photo 1 of 7 in A Musty Attic is Transformed Into a Luminous Loft